Separable brake block and shoe.



PATENTED DEC. 29, 1903.

W. D. SARGENT. SEPARABLE BRAKE BLOCK AND SHOE.

APBLIUATION FILED JUNE 10. 1903.

N0 MODEL.

10.. wvmmmon n c Patented December 29, 1903.

PATENT OFFICE.

WILLIAM D. SARGENT, OF NEW YORK, N. Y., ASSIGNOR TO AMERICAN BRAKE SHOE(it FOUNDRY COMPANY, OF NEW YORK, N. Y., A COR- PORATION OF NEW JERSEY.

SEPARABLE BRAKE BLOCK AND SHOE.

SPECIFICATION forming part of Letters Patent No. 748,220, dated December29, 1903.

Application filed June 10, 1908. Serial No. 160,903. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM D. SARGENT, acitizen of the United States,residing at New York, in the State of New York, have invented a certainnew and useful separable Brake Block and Shoe, of Which the following isa specification.

My invention relates to wheel brakes such as are commonly used onrailway cars, and particularly to that type of brake head designed toembrace the end of the brake beam, as when placed close to the wheel.The objects of my invention are, to provide a separable combined brakeblock and shoe which will occupy an extremely small space and does notrequire room for the provision of cast lugs upon the parts; to provide abrake block with a renewable -wearing shoe on the face of the same; toprovide reliable and economical means for attaching the wearing sole ofa combined brake block for positions where there is not room to use theordinary brake head; and to generally improve the design and increasethe economy in wear of combined brake blocks and shoes.

These objects, together with other advantages which will hereinafterappear, I attain by means of the construction and assembly of parts asillustrated in preferred form in the accompanying drawings, whereinFigure 1 is a side elevation of my device.

Figure 2 is an under plan of the head part, the removable shoe beingtaken away to show the novel form of malleable lug I use upon the head.

Figure 3 is a vertical section on the' line a:- a; in Figure 1, showingthe block and wearing sole joined together.

The form of integral brake block or head formerly in wide use in ourownrailwayprac- I tice, and still almost universally used in Europe, isvery expensive because when the sole of the block is worn down it isnecessary to discard the whole block as scrap metal and replace it anew.To avoid this difficulty separable brake shoes are provided, and thehead portion is made to perform only the function of holding the shoe inplace. But in places where there is little room the ordinary separablecast heads and shoes cannot be used, even when the head is provided witha socket which embraces the brakebeam, because the cast attaching eyelugs require considerable space to attain the necessary thickness andstrength. in order to provide a separable brake block and shoe which maybe indefinitely reduced in the space it occupies between the wheel andthe beam, I provide for connecting the two parts with malleable lugs, asshown in the drawings.

The head part a, designed to go upon the brake beam, is provided with anannular ring g cast integral therewith and has four legs f which restupon the wearing sole or shoe proper, b. In order to attach the block b,I use some form of malleable lug such as the embedded strap a, as shownin Figure 3, and on the head portion (it I use eye lugs d, formed.

of malleable wire embedded in the metal and which may also surround theopen portion of the head, being embedded in the ring g, and making twoloops on each side as shown in Figure 2.

The four feet or legs f rest directly upon the cast part of the block b,and the central malleable lug c fits between the two lugs d of the headportion and is held in place by means of any ordinary key e, as shown inthe drawings, the lug 0 being thus brought up close under the positionof the brake beam itself, which works in the opening within the ring g,as will be understood.

The loop 72. of the wire which forms the lugs on the head, thussurrounding the brake beam itself and taking directly all the necessarystrain, the thickness of metal between the brake beam and the positionto be occupied by the lug 0 may be made extremely small, and thus greateconomy of space may be attained. At the same time by reason of thecombination shown, the block b when worn out may be replaced and thecustomary loss of the whole casting which forms the block is avoided. Bythis means also, the head may be all cast except the malleable lugs (1without danger of breakage.

The many advantages of this device will readily occur to those familiarwith its use.

Having thus described my invention and illustrated its use, what I claimas new, and

desire to secure by Letters Patent, is the following:

1. A combined brake block and shoe made in separable parts and the twoparts being attached by means of a malleable eye lug between them.

2. A combined brake block and shoe com posed of two parts, the wearingshoe being attached to the block by means of lugs on the latter composedof malleable wires surrounding the brake beam and projecting to form eyelugs, substantially as described.

3. A brake block and shoe comprising a wearing sole having a malleableeye lug and a cast block to support the same on the beam, also providedwith malleable eye lugs.

4. The combination of a wearing shoe having a malleable attaching eyelug and a brake block having malleable attaching eye lugs, whereby thespace between the brake beam and the shoe may be reduced approximatelyto the height of the key way.

5. A combined brake block and shoe having a renewable wearing face, thetwo parts being attached by means of malleable eye lugs, and the lugupon the head portion being formed of wires surrounding the brake beam.

In testimony whereof I have hereunto signed my name in the presence ofthe sub- 30 scribed witnesses.

WILLIAM D. SARGENT.

Witnesses:

WILLIAM OONOVER, BRoNsoN G. BUXTON.

